From 5480c133aeea98845112147f1fe406be02814259 Mon Sep 17 00:00:00 2001
From: Jan Nieuwenhuizen <janneke@gnu.org>
Date: Sat, 23 Nov 2019 21:29:36 +0100
Subject: [PATCH] mescc: Mes C Library: Fix isatty for x86_64.

* lib/linux/ioctl.c (ioctl3): New function.
* include/sys/ioctl.h: Declare it.
* lib/posix/isatty.c (__tcgetattr): Use it.
---
 include/sys/ioctl.h | 1 +
 lib/linux/ioctl.c   | 7 +++++++
 lib/posix/isatty.c  | 2 +-
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/include/sys/ioctl.h b/include/sys/ioctl.h
index f26c9f8e..2650929e 100644
--- a/include/sys/ioctl.h
+++ b/include/sys/ioctl.h
@@ -29,6 +29,7 @@
 #define TCGETS 0x5401
 #define TCGETA 0x5405
 int ioctl (int fd, unsigned long request, ...);
+int ioctl3 (int fd, unsigned long request, long data);
 
 #endif // ! SYSTEM_LIBC
 
diff --git a/lib/linux/ioctl.c b/lib/linux/ioctl.c
index 5e45c8c7..7df28a0b 100644
--- a/lib/linux/ioctl.c
+++ b/lib/linux/ioctl.c
@@ -33,3 +33,10 @@ ioctl (int filedes, unsigned long command, ...)
   va_end (ap);
   return r;
 }
+
+int
+ioctl3 (int filedes, unsigned long command, long data)
+{
+  int r = _sys_call3 (SYS_ioctl, filedes, command, data);
+  return r;
+}
diff --git a/lib/posix/isatty.c b/lib/posix/isatty.c
index db2319ec..cf983f6c 100644
--- a/lib/posix/isatty.c
+++ b/lib/posix/isatty.c
@@ -58,7 +58,7 @@ int
 __tcgetattr (int filedes, struct termios *termios_p)
 {
   struct ktermios kernel_termios;
-  int r = ioctl (filedes, TCGETS, &kernel_termios);
+  int r = ioctl3 (filedes, TCGETS, (long) &kernel_termios);
 
   termios_p->c_iflag = kernel_termios.c_iflag;
   termios_p->c_oflag = kernel_termios.c_oflag;